319442887693 has 2 divisors, whose sum is σ = 319442887694. Its totient is φ = 319442887692.

The previous prime is 319442887661. The next prime is 319442887787. The reversal of 319442887693 is 396788244913.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 236753284329 + 82689603364 = 486573^2 + 287558^2 .

It is a cyclic number.

It is not a de Polignac number, because 319442887693 - 2⁵ = 319442887661 is a prime.

It is a super-2 number, since 2×319442887693² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (319442887633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159721443846 + 159721443847.

It is an arithmetic number, because the mean of its divisors is an integer number (159721443847).

Almost surely, 2^319442887693 is an apocalyptic number.

It is an amenable number.

319442887693 is a deficient number, since it is larger than the sum of its proper divisors (1).

319442887693 is an equidigital number, since it uses as much as digits as its factorization.

319442887693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62705664, while the sum is 64.

The spelling of 319442887693 in words is "three hundred nineteen billion, four hundred forty-two million, eight hundred eighty-seven thousand, six hundred ninety-three".